Zhongbai Liu, Tao Zhou, Lei Huang, Xinguang Cheng, Zhen-en Huang
{"title":"The amplification effect of river valley topography on seismic response of a tunnel near the valley: simulated by boundary element method","authors":"Zhongbai Liu, Tao Zhou, Lei Huang, Xinguang Cheng, Zhen-en Huang","doi":"10.1144/qjegh2022-142","DOIUrl":null,"url":null,"abstract":"Many tunnels are inevitably built near valley terrain, which greatly amplifies the seismic response of the tunnel. This paper considers the interaction between valley terrain and tunnels, proposes a high-precision indirect boundary element method (IBEM) for simulation, and verifies the correctness of the method. The impact of factors such as incident wave type, incident frequency, and distance between the tunnel and the valley on the seismic response of the tunnel is then analyzed in detail. The numerical analysis demonstrates that the stress of the tunnel can be amplified by approximately twice when the distance between the river valley and the tunnel is 10m due to the scattering and coherence effects of seismic waves. However, when this distance is greater than 50m, the presence of river valleys has little effect on the stress of the tunnel. The stress at the right shoulder of the tunnel and the displacement amplification effect on the valley slope is significant compared to other areas. The findings of this study provide theoretical guidance for the seismic fortification and disaster avoidance of tunnel structures near river valleys.","PeriodicalId":20937,"journal":{"name":"Quarterly Journal of Engineering Geology and Hydrogeology","volume":" ","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Quarterly Journal of Engineering Geology and Hydrogeology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1144/qjegh2022-142","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Many tunnels are inevitably built near valley terrain, which greatly amplifies the seismic response of the tunnel. This paper considers the interaction between valley terrain and tunnels, proposes a high-precision indirect boundary element method (IBEM) for simulation, and verifies the correctness of the method. The impact of factors such as incident wave type, incident frequency, and distance between the tunnel and the valley on the seismic response of the tunnel is then analyzed in detail. The numerical analysis demonstrates that the stress of the tunnel can be amplified by approximately twice when the distance between the river valley and the tunnel is 10m due to the scattering and coherence effects of seismic waves. However, when this distance is greater than 50m, the presence of river valleys has little effect on the stress of the tunnel. The stress at the right shoulder of the tunnel and the displacement amplification effect on the valley slope is significant compared to other areas. The findings of this study provide theoretical guidance for the seismic fortification and disaster avoidance of tunnel structures near river valleys.
期刊介绍:
Quarterly Journal of Engineering Geology and Hydrogeology is owned by the Geological Society of London and published by the Geological Society Publishing House.
Quarterly Journal of Engineering Geology & Hydrogeology (QJEGH) is an established peer reviewed international journal featuring papers on geology as applied to civil engineering mining practice and water resources. Papers are invited from, and about, all areas of the world on engineering geology and hydrogeology topics. This includes but is not limited to: applied geophysics, engineering geomorphology, environmental geology, hydrogeology, groundwater quality, ground source heat, contaminated land, waste management, land use planning, geotechnics, rock mechanics, geomaterials and geological hazards.
The journal publishes the prestigious Glossop and Ineson lectures, research papers, case studies, review articles, technical notes, photographic features, thematic sets, discussion papers, editorial opinion and book reviews.